(2013·哈爾濱四校高三一模)In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.
A．give inB．give off
C．give away D．give up
B
選B　考查動詞短語辨析。句意：事實上我們燒的燃料和食用的植物性食物都是以熱量的形式釋放出它們所含有的化學能。根據(jù)句意可知應選give off，表示“放出，發(fā)出”。
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